Martian Meteorite - Composition


As of July 30, 2011, 98 of the 99 Martian meteorites are divided into three rare groups of achondritic (stony) meteorites: shergottites (83), nakhlites (13), and chassignites (2), with the oddball meteorite Allan Hills 84001 usually placed within a specific "OPX group". Consequently, Martian meteorites as a whole are sometimes referred to as the SNC group. They have isotope ratios that are said to be consistent with each other and inconsistent with the Earth. The names derive from the location of where the first meteorite of their type was discovered.

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